The Heat of Mixing for Binary Mixtures of Triethylamine with Alcohols

1961 ◽  
Vol 14 (4) ◽  
pp. 520 ◽  
Author(s):  
TJV Findlay
Keyword(s):  
Binary Mixtures ◽  
Vapour Pressure ◽  
Alcohol Molecule ◽  
Heat Of Mixing ◽  
Pressure Data ◽  
Calorimetric Measurements

Calorimetric measurements of the heat of mixing have been made at 25 �C and 40 �C for binary mixtures of triethylamine with methanol, and at 25 �C and 45 �C for binary mixtures of triethylamine with ethanol, n-propanol, and n-butanol. It is found that the heat of mixing for these systems becomes slightly less negative as the temperature is increased. However, apart from methanol, the size of the alcohol molecule has little effect on the heat of mixing. The results obtained are compared with those calculated from vapour pressure data in an earlier paper.

VAPOUR PRESSURES AND BOILING POINTS OF BINARY MIXTURES OF HYDROGEN PEROXIDE AND WATER

1940 ◽  
Vol 18b (7) ◽  
pp. 181-193 ◽  
Author(s):  
P. A. Giguère ◽  
O. Maass
Keyword(s):  
Hydrogen Peroxide ◽  
Binary Mixtures ◽  
Vapour Pressure ◽  
Pressure Data ◽  
Boiling Points ◽  
Partial Pressures ◽  
Special Apparatus ◽  
Margules Equation ◽  
Latent Heat Of Vaporization ◽  
Good Agreement

The total vapour pressures of binary mixtures of hydrogen peroxide and water have been measured by means of the static method at 30, 45, and 60 °C. over the entire range of concentration. The vapour-pressure–composition curves have been found to exhibit large negative deviations from Raoult's law, but no minimum. A special apparatus and experimental technique were devised that enabled the composition of the vapour to be determined in each case. These data were used to obtain the partial pressures of both components. The values thus found are in good agreement with those calculated from the total vapour pressures by means of the Duhem Margules equation. The activities of water and hydrogen peroxide in their solutions have been calculated and interpreted on the basis of the polarity of the two pure liquids.The normal boiling point and latent heat of vaporization of the solutions were obtained by extrapolation of the vapour pressure data. The results are important in connection with the distillation of aqueous solutions of hydrogen peroxide.

Vapour-pressure data for adducts of dimethylzinc: sources and dopants for zinc in metal–organic chemical vapour deposition

1993 ◽  
Vol 3 (7) ◽  
pp. 739-742 ◽  
Author(s):  
Paul O'Brien ◽  
John R. Walsh ◽  
Anthony C. Jones ◽  
Simon A. Rushworth ◽  
Clive Meaton
Keyword(s):  
Chemical Vapour Deposition ◽  
Vapour Pressure ◽  
Vapour Deposition ◽  
Chemical Vapour ◽  
Organic Chemical ◽  
Pressure Data ◽  
Metal Organic

scholarly journals Vapour Pressure of Ethanol and 1-Propanol Binary Mixtures

2016 ◽  
Vol 44 (1) ◽  
pp. 33-38 ◽  
Author(s):  
Misirkhan Talibov ◽  
Javid Safarov
Keyword(s):  
Binary Mixtures ◽  
Vapour Pressure ◽  
Heat Of Evaporation

Abstract The vapour pressure of binary mixtures containing ethanol and 1-propanol were investigated at temperatures ranging from 274.15 to 443.15 K using two different setups with static methods. The measured values were fitted to a Clausius-Clapeyron type relationship. The heat of evaporation of mixtures was determined from the vapour-liquid equilibria data.

scholarly journals Notizen:Mischungsenthalpien beim flüssigen System Wasser + Essigsäure / Heats of Mixing for the Liquid System Water + Acetic Acid

1972 ◽  
Vol 27 (10) ◽  
pp. 1527-1529 ◽  
Author(s):  
R. Haase ◽  
P. Steinmetz ◽  
K.-H. Dücker
Keyword(s):  
Acetic Acid ◽  
Power Series ◽  
Liquid System ◽  
Heat Of Mixing ◽  
Pure Liquid ◽  
Calorimetric Measurements ◽  
Heats Of Mixing ◽  
Free Parameters ◽  
C 30 ◽  
System Water

Calorimetric measurements of the heats of mixing for the liquid system water+acetic acid at 17 °C, 20 °C, 25 °C, 30 °C, 40 °C, and 50 °C show that there is a change of sign in the function H̅E(x), where H̅E denotes the molar heat of mixing and x the mole fraction of acetic acid. The process of mixing the pure liquid components is weakly exothermic for low acid concentrations, but strongly endothermic for high acid concentrations. The function H̅E can be approximately represented by the usual power series with respect to x, five free parameters at each temperature being necessary.

The absorption of organic vapours by thin films of nitrocellulose

1954 ◽  
Vol 225 (1163) ◽  
pp. 478-504 ◽  
Keyword(s):  
Thin Films ◽  
Vapour Pressure ◽  
Alternative Explanation ◽  
Solubility Parameters ◽  
High Polymer ◽  
Pressure Data ◽  
Nitrate Esters ◽  
Aliphatic Ketones ◽  
Propyl Ketone

To check modem theories of high-polymer solutions measurements have been made of the effect of dissolved nitrocellulose on the vapour pressure of each of the following compounds: acetone, five other aliphatic ketones, dioxane, ethyl n -propyl ether, acetonitrile and nitromethane. All measurements were made at 20° C, the vapour pressures being directly observed and the mixtures analyzed by magnetic weighing in situ . The results for acetone confirm those by earlier workers, The isotherms for ethyl propyl ether, acetonitrile and nitromethane are satisfactorily described by the equation of Huggins (1942) with a different constant value of the parameter μ in each case. These μ values lead to a constant value of the ‘solubility parameter’ of nitrocellulose which is compatible with earlier data on the absorption of hydrocarbons and of diethyl ether. In contrast, the isotherms for the six ketones are not satisfactorily explained in that ( a ) the 11 values are not constant for any one isotherm , ( b ) the values predicted from ‘solubility parameters’ are incorrect. An alternative explanation is proposed, based on the Bronsted-Koefoed (1946) concept of ‘congruence’, which leads to an equation with one constant which is approximately the same for five of the ketones studied and for two ketones studied by previous workers. This equation is shown to be in agreement with previous work on (i) osm otic pressure, (ii) the absorption of carboxylate esters, (iii) the vapour pressure of acetone solutions of simple nitrate esters, and some further consequences are discussed. The results for dioxane and di- iso propyl ketone remain, however, anomalous on either interpretation. In an appendix vapour-pressure data are given for the compounds studied, and are compared with previous observations.

Thermodynamics of binary mixtures of 1,2-dichloroethane with aromatic hydrocarbons

1980 ◽  
Vol 58 (18) ◽  
pp. 1902-1905 ◽  
Author(s):  
Ram K. Nigam ◽  
Prem P. Singh ◽  
Krishan C. Singh ◽  
Mohan Singh ◽  
Ruchi Mishra
Keyword(s):  
Binary Mixtures ◽  
Aromatic Hydrocarbons ◽  
Vapour Pressure ◽  
Excess Volumes ◽  
Equimolar Mixture ◽  
Excess Enthalpies ◽  
Molar Excess ◽  
Experimental Values ◽  
Molar Excess Volumes

Molar excess volumes, VE at 298.15 and 308.15 K, molar excess enthalpies HE at 308.15 K, and total vapour pressure at 298.15 and 308.15 K. have been measured for binary mixtures of 1,2-dichloroethane with aromatic hydrocarbons. The VE and HE data for an equimolar mixture at 308.15 K only have been utilized to predict VE, HE, and TSE values (using Sanchez and Lacombe theory) for these mixtures as a function of temperature and composition. The agreement between the predicted and the corresponding experimental values is good so far as VE and HE data are concerned but the same is not true of the TSE values.

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